Loom stop motion



Feb. 20, J, N UB 2,369,844

LOOM STOP MOTION Fiied July 13, 1944 INVZ'NT 01? Jacob Neg/java! Patented Feb. 20, 1945 UNITED STATES PATENT OFFICE v 2,369,844 I v 7 :LOOM STOP MOTION Jacob Neubauer, Manchester, Conn. I Application July 13, 1944, Serial No. 544,661 4Clain s. (015139-337) This invention relates to looms and particularly to a stop motiontherefor topromptlystop operation of the loom if any one of the harness frames fails to properlyfunction.

More particularly the invention relatesto harness stop motion for looms in which the harness frames are operated in pairs, that is, pairs of adjacent harness frames are moved simultaneously either both up" or both down. 1 An object of the invention is to stop the loom promptly'when one of a pair of harness frames, which are designed to operate simultaneously, fails to move withits mate.

A feature that enables the above object "to be accomplished is that the adjacent harness frames operating together in pairs are provided with a loop of flexible cord attached preferably by screw eyes or other means at one of the ends of-each of the frames, the series of loops also being attached to a stop motion device of any type "applied to the main driving shaft of the loom.-

Another feature that is important is that the loop connecting the ends of a pair of harness frames operating together is sufficient in length to permit simultaneous operation of the harness frames from one position to the other withoutjactuating the stop motion but when one of a pair of harness frames moves without its mate the-loop is drawn in a direction so that a pull is effected cation and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of this specification, I have shown the invention schematically in a convenframesin which one of the pair has failed to operate with its mate and has actuated the stop motion.

In the above-mentioned drawing there has beenshown but one embodiment of the invention which is now deemed preferable, butit is to be understood that changes and modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Briefly, and in its preferred aspect, the inven operating member for releasing the latch when one of any pair of harness frames fails to move with its mate.

Referring more in detail to the figures of the drawing, there is shown the principal operative supports a number of harness frames I l actuated by any form of dobby or other pattern control tional form of broad loom but it will be under-- stood that the invention can be otherwise embodied and that the drawing is notto be-fconstrued as defining 'or limiting the scope of; the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Figure 1 is a front elevation of a conventional form of loom showing schematically a form of clutch for starting and stopping the loom Fig. 2 is a perspective view of a group Ofghal ness frames showing pairs of frames in their, two operative positions with their stop motionf'actuating members, and

Fig. 3 is a similar view of a pair pf harness motion (not shown). The frames are supported for up and down movement as called for by the pattern being woven through straps l2 attached to operating bell cranks l3 controlled by the dobby or other pattern control motion.

In setting up a loom for a warp it is usually desirable in weaving many types of fabrics to operate the frames I I in pairs of adjacent frames as shown in Fig. 2 of the drawing. By this means the warp threads may be more evenly spread out through the harness and the action of the harness improved. Advantage of this arrangement in pairs of the frames II is availed of to operate a stop motion for the loom in the event any one of a pair of frames fails to operate with its mate. For this purpose attaching means IS- in the form of screw eyes are provided in one of the ends of each frame. A loop of flexible cord I 4 passes through the eyes I3 of. each of a pair of frames. The length of loops 14 is ample to permit movement up or down of the frames H forming a pair without tightening the loop or forcing the endconnection [5 to move a substantial distance toward the frames. This will be obvious by an inspection of Figs. 2 and 3.

Each of the loops i4 is attached to a cable l6 as shown in Fig. 2 so that when any one frame of the entire group fails to operate one of the IS in driving position as shown in Fig. 1.

loops I4 is drawn taut and pulls the cable Hi to the right as seen in the figures.

The opposite end of cable I6 is attached to a latch member I! normally holding the clutch or starting lever I 8 in position to hold the clutch When cable I6 is pulled toward the right, latch H is disengaged from lever l8 thus allowing spring 20 to disengage the driving clutch l9 and stop the loom.

driving shaft 22 are only diagrammatically shown and may be of any standard or usual form. Any form of disengaging means may be used in place of the latch I! shown in the drawing. The purpose is to promptly disconnect the driving connections between the driving pulley as soon as a frame I I fails to operate properly and stop rotation of shaft 22.

When a harness frame has failed to move with its mate and the cable l6 has pulled the latch H to its clutch releasing position, the latch cannot be returned to its engaging position until the harness frame failure has been corrected. Until that has been done the clutch l9 will be retained in its open position. by the spring 20 and the loom cannot be operated.

It will be understood that this stop motion is supplemental to the usual manual stopping means (not shown) for the loom and of any other stop motions controlled by breakage of the warp or filling threads.

What I claim is:

1. A loom stop motion comprising in combination, a plurality of harness frames operable in pairs, driving means for said loom having a releasable connection, and flexible connections The driving connections from pulley 2! to the from frames operating in pairs to said connection, whereby when the harness frames forming a pair separate the driving connection will be released.

2. A loom stop motion comprisingin combination, driving means for said loom having a releasing lever, a plurality of harness frames, means to' operate said frames in pairs of adjacent frames to their upper and lower operative positions, con- 10 nections extending from the frames constituting a pair to a'stop motion lever, whereby movement of one of the frames of a pair-without its mate will actuate said lever and stop said loom.

3. A loom stop motion comprising in combination, driving means for said loom having a releasing lever, a plurality of harness frames, means to operate said frames in pairs of adjacent frames to their upper and lower operative positions, a loop of flexible material attached to adjacent ends of frames constituting a pair, a flexible member connecting said loop to a stop motion actuating lever, whereby when the frames of a pair separate said loop is drawn in a direction to actuate said stop motion.

4. A; loom stop motion comprising in combination, a plurality of harness frames operable in pairs, driving means for said loom having a releasable connection, flexible connections from frames operating in pairs to said releasable con-- nection, whereby when a harness frame of a pair fails to move with its mate said connection in said driving means will be released, said means preventing re-engagement of said driving connec-- tion until said harness frame failure has been corrected.

JACOB NEUBAUER. 

